Banca de DEFESA: AUREA PINTO DOS RAMOS
Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.STUDENT : AUREA PINTO DOS RAMOS
DATE: 28/02/2023
TIME: 09:00
LOCAL: Sala 24 do Departamento de Solos
TITLE:
Invertebrate Fauna and Soil Attributes in an Agroforestry System and Secondary Forest in the Atlantic Forest Biome in the State of Rio de Janeiro
KEY WORDS:
Agroforestry, soil conservation, soil fauna
PAGES: 87
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Ciência do Solo
SPECIALTY: Manejo e Conservação do Solo
SUMMARY:
The devastation of the Atlantic Forest Biome can be mitigated with the use of conservation management in agricultural production systems that promote the maintenance and/or improvement of soil quality. The objective of this study was to analyze the composition, density and diversity of soil fauna (epigean and macrofauna) in an Agroforestry System (AFS) and in a forest fragment (FL) in the Atlantic Forest biome in the municipality of Seropédica, RJ. The agroforestry system (SAF) was 8 years old and the sub-deciduous tropical forest fragment in regeneration (FL) was 28 years old. Physical attributes (granulometric analysis, temperature and humidity and weight), chemical attributes, determination of total organic carbon (TOC), granulometric fractionation of soil organic matter, determining the organic carbon of the particulate fraction (COP) and the fraction associated with minerals (COAM) and the invertebrate fauna of the soil by Pitfall and tropical soil biology fertility (TSBF) methods. Additionally, in the litter, the stock was quantified, the gravimetric humidity, the nitrogen (N), phosphorus (P) and potassium (K) contents, and the epigeal fauna were evaluated. From the data of the invertebrate fauna, the density of individuals, richness and diversity indices of Shannon, and evenness of Pielou were calculated. Soil data were analyzed for normality and homoscedasticity of variances using the Shapiro-Wilk and Bartlett tests, and later the variables were analyzed using the F test. In addition, the data set was subjected to principal component analysis (PCA) and coinertia analysis. Higher levels of clay, moisture, sorting complex, T value, S value, V% value of the soil and the indices of diversity and uniformity in the soil fauna in the AFS area were verified. There was no difference for temperature, levels of Al3+, TOC, COP and COAM between the areas. With regard to invertebrate fauna, it was observed in both seasons greater abundance, diversity and evenness indices of the fauna in the SAF area in the two evaluation methods, except in litter (TSBF) in which higher diversity and evenness indices were verified in the FL area. As for the multivariate analyses, a greater correlation was observed between faunal organisms, carbon fractions, P, K+, pH, clay, potential acidity, humidity and temperature in the AFS area. The relationship between the physical, chemical and biological attributes was verified by the coinertia analysis. It is concluded, therefore, that the AFS was efficient for the maintenance of the physical and chemical attributes of the soil and the litter, favoring the increase of soil fertility. Management with an agroforestry system promoted favorable environmental conditions for the abundance, diversity and distribution of the soil invertebrate fauna community. The coinertia analysis showed the close relationship between the physical and chemical attributes and the invertebrate fauna groups in the soil.
COMMITTEE MEMBERS:
Presidente - 1060711 - MARCOS GERVASIO PEREIRA
Externa ao Programa - 092.032.247-69 - CRISTIANE FIGUEIRA DA SILVA
Externo à Instituição - ALEXANDER SILVA DE RESENDE - EMBRAPA